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Collisional dephasing of the Na 1 3 d − 1 3 f transition using the Ramsey method of separated rf fields

1979; American Institute of Physics; Volume: 19; Issue: 2 Linguagem: Inglês

10.1103/physreva.19.820

0556-2791

T. F. Gallagher, W. E. Cooke,

Advanced Frequency and Time Standards

The collisional dephasing of the Na $13d\ensuremath{-}13f$ transition by Ne and CO has been investigated using the Ramsey method of separated radio-frequency fields. Upper limits for the dephasing cross sections are determined which are far smaller than the geometric size of the excited Na atoms. This leads to the conclusion that the separation of the potential cruves of the Na $13d\ensuremath{-}X$ and $13f\ensuremath{-}X$ states is nearly constant as a function of internuclear separation.